LMX2346 Datasheet, PDF (1/27 Pages) National Semiconductor (TI) – PLLatinum™ Frequency Synthesizer for RF Personal Communications

June 2004
LMX2346/LMX2347
PLLatinum^™ Frequency Synthesizer for RF Personal
Communications
LMX2346 2.0 GHz
LMX2347 2.5 GHz
General Description
The LMX2346/7 are high performance frequency synthesiz-
ers with an integrated 32/33 dual modulus prescaler. The
LMX2346 is designed for RF operation up to 2.0 GHz. The
LMX2347 is designed for RF operation up to 2.5 GHz. Using
a proprietary digital phase locked loop technique, the
LMX2346/7 generates very stable, low noise control signals
for UHF and VHF voltage controlled oscillators.
Serial data is transferred into the LMX2346/7 via a three-line
MICROWIRE interface (DATA, LE, CLOCK). Supply voltage
range is from 2.7V to 5.5V. The charge pump provides 4 mA
output current.
The LMX2346/7 are manufactured using National’s 0.5µ
ABiC V silicon BiCMOS process and is available in 16-pin
TSSOP and 16-pin CSP packages.
Features
n RF operation up to 2.5 GHz
n 2.7V to 5.5V operation
n Digital & Analog Lock Detect
n 32/33 Dual modulus prescaler
n Excellent Phase Noise
n Internal balanced, low leakage charge pump
n Pin Compatible to LMX2323
Applications
n Cellular DCS/PCS/3G infrastructure equipment
n Wireless Local Area Networks (WLANs)
n Other wireless communication systems
Functional Block Diagram
PLLatinum™ is a trademark of National Semiconductor Corporation.
© 2004 National Semiconductor Corporation DS200384
20038406
www.national.com